Missing type declaration

'Microsoft.Network/frontDoors/frontendEndpoints/customHttpsConfiguration@2020-07-01' produce BCP081.

**Bicep version**
Bicep CLI version 0.4.63 (7ebed03284)

**Describe the bug**
When using this resource in VS Code a warning is shown.

**To Reproduce**
Steps to reproduce the behavior:

Paste in following code in VS Code.

```bicep
resource FrontDoor_CustomDomain1 'Microsoft.Network/frontDoors/frontendEndpoints/customHttpsConfiguration@2020-07-01' = {
}
```

Start by reproducing the warning in VS Code with the Bicep resource snippet from the issue and inspect how this Azure resource type is recognized. Done means the resource no longer produces BCP081 for version 2020-07-01.

Written by the indexing model from the issue text.